Cutter disengaging device



Jan. 74VL9^4Q-4 Af/NR', dEENNER 2,186,094 j CUTTER DISENQAGING DEVICE Filed Nov. 27, 1937 FIG.6. 45 4.2"40 l43 2o INVENTOR, RUSSELL E.BENNER.

ATTO NEY.

,/Pnehted Jen. 9, 1940 UNITED STATES `P.,.TE1-1T oFElcE mcsne ts, to

Remington Band Inc.,

Buifalo, N. Y., a corporation of Delaware Application November 27, 1937, Serial No. 176,791 10 Claims. (Cl. 30e-43) This invention relates to improvements on electric dry shaver's of a well know type and particularly to means for disengaging the inner cutter.

5 Electric Shavers now in wide useinclude a motor housing to which is secured a iixed shearing head having a reciprocating inner cutterl -20 the Vfixed outer shearing head from the motor casing. The improvement lies in the provision of a trigger which extends out of one side of the motor casing, the depression of which releases the inner cutter to pennit easy removal thereof. 95 Another object of this invention is to provide a simple and time-saving means for disengaging the cutters for cleaning purposes.

Other and further objects of thisinvention 'will appear morefully'fromV a detailed description of 30 the device as hereinafter disclosed.

This invention resides substantially in the combination, construction, arrangement. and the relativ location of the parts, all as will be shown in greaterV detail in the following specication in lo connection with Vthe illustrations and drawing therein, .in which:

Fig. 1 isa side elevationalview of a fragmentary portion of A ashaver showing part of the device covered V by this invention;

40. Fig. 2 isacross sectional view of thesamedevice taken'suhstantially along Yline 2-2 of Fig. 1;

Fig. 3 is arvie'w ofthe same device taken substantially alongjline 3-3 of Fig. 2;

Fig. 4 is an'end view 'of the same device-shown in crosssection with the trigger depressed andv withtheparts f forremovaloftheinner cutter;

Fig. 541s aside elevational view similar to that in Fig. 1, but withthe side casing removed, parts 50 broken' away, andthe inner cutter partly removed; 'and Flg. 6 is a view taken substan along line '3-3 of Fig. 5 with partsbroken away.

Ilkecharacters ofreference refer tolikeparts inallviews.'

Y Referring to the drawing, a fragmentary portion of acasing 2li of any well known electric dry shaver is shown. Said casing 20 encloses a motor'also well known and not described save for a few essential parts. Near the top of cas- 5 ing 20, on the front face thereof, is a rectangular slot 2l within a depression 22. Projecting out of said rectangular slot 2| is the end of a trigger 23. Secured to casing 20 is aiixed outer cutter 24, within which is reciprocally mounted an inner 10 cutter 25. Ihe xed outer cutter 24 is secured tocsing 20by ascrew26.

As hereinbefore indicated, within casing 20 is a well knownmotor and its mechanism, of which l21 represents a motor driven rotatable shaft in 15 two distinct parts. 'I'he lower part 2li` of said shaft 21 has apair of lugs 2S oppositely positioned near the upper end thereof. Theupper part 30 of shaft 21 has at its extreme end an eccentric eem 3| and eine lower end-a sleeve 32 having a. 20 shoulder 33. Within said sleeve 32 is a pair of grooves 34 serving as guideways' for lugs 29 on the lower part 28 of shaft 21. Sleeve 32 slidably engages the upper portion of the lower part 28 of shaft 21. 'A spring member 35 is loosely seated 25 on top of lower part 28 of shaft 21 and is posiltioned wholly within sleeve 32.

0n each sideof shaft 21 is a pair of springpressed plungers 36, each having a shoulder 38. Said spring-pressed plungers 36 are supported 80 at theirlower ends by a supporting plate 31 through which shaft 21 extends.

Pressure plate'39 is movably seated on shoulders 33 and 38 of sleeve 32 and plungers 36 respectively. Through the center of pressure plate 3.5 33 is an aperture 40. While aperture 40 has enough 'clearance for cam 3|and upper part 30 of shaft 21 to pass through, shoulder 33 of sleeve 32 acts as a stop therefor. On each side of aper lture llare substantially similar apertures' Il, 40

throughl which the upper parts of plungers 33 extend. Shoulders 33 of plungers 36'act as stops for apex-hues 4I.

Secured to theinner'rear wall of casing-2l' by screws' n is e bracket n having e heed piece 44 which is rolled into a cylindrical shape forming'a bore through which a pivot pin 45 extends. Trigger 23ispivotallysecured tohea'd piece 44 of plate 43 by pivot pin 45, and has suhstano tially the shape of a fork, formed by arms 46 and 41 thereof. Arm 46 is the shorter of the said anns'andisjoinedtoarmbyapairofsmall rivetsV i3. AA nns 46 and 41 extend transversely oneachsideofshaft 21 andhave arcuate pro-.u

jections 49 protruding from their respective lower sides.

Inner cutter 25 is provided with a groove 50 which engages cam 3l on the top of the motor driven and rotatable shaft 21. Cutouts l engage the tip ends of spring-pressed plungers 36.

Figs. l, 2, and 3 show the inner cutter 25 in locked engagement with cam 3l of shaft 21 and spring-pressed plungers 36. 'I'he commercially known means tov remove inner cutter 25 is by loosening screw 26, removing the fixed outer cutter 24 and then sliding out the inner cutter 25.

In the operation of thev device covered by this invention, to remove inner cutter 25, the trigger 23 is depressed, moving it from the position shown in Fig. 2 to that shown in Fig. 4. By so doing, the arcuate projections 49 act upon the plate 39 to depress the upper portion 30 of the shaft 21 against the tension of spring 35. Like Wise plate 39 bears down on shoulders 38 of spring-pressed plungers 36. By this means cam 3l and spring-pressed plungers 36 are respectively disengaged from groeve 50 and cut-outs 5| of inner cutter 25, thereby permitting the easy removal of the inner cutter, as partly shown in Fig. 5.

While I have described what I consider to be a highly desirable embodiment of my invention, it is obvious that many changes inform could be made without departing from the spirit of my invention, and I, therefore, do not limit myself to the exact form herein shown and described, nor to anything less than the whole of my 'invention as hereinbefore set forth, and as hereinafter claimed.

W'hat I claim as new, and desire to secure by Letters Patent, is:

l. The combination in a dry shaver of a motor casing, a rotatable shaft having an upper and lower. section, the upper section being slidably mounted upon the lower section, longitudinal lugs near the top of said lower section, a sleeve at the base of said upper section having longitudinal grooves therein as guideways for said lugs, a spring member positioned between the lower and upper sections of said shaft within said sleeve, spring-pressed pins, shoulders on said sleeve and pins supporting a pressure plate, a fork-shaped trigger pivotally secured to said cas-` ing and bearing down on said pressure plate, an eccentric cam on said upper section, a fixed outer cutter, an inner cutter reciprocally mounted therein having engagement with said cam and pins, and means on said trigger to release the inner cutter from said cam and pins.

2. The combination in a dry shaver of a motor casing, a' rotatable shaft having an upper and lower section, the upper section being slidably mounted upon the lower section, 'longitudinal lugs near the top of said lower section, a sleeve` at the base of said upper section having longi-v tudinal grooves therein as guideways for said lugs, a spring member positioned between the lower and upper sections of said shaft within said sleeve, spring-pressed pins, shoulders on said sleeve and pins supporting a pressure! plate, a fork-shaped trigger-bearing down on said pressure plate, an eccentric cam on said upper section, a xed outer cutter, and an inner cutter reciprocally mounted therein having engagement with said cam and pins.

3. lIhe combination in a dry shaver of a motor casing, a rotatable shaft having an upper and lower section, the upper section being slidably mounted upon the lower section, longitudinal Aa motor casing, a rncrriber' slidably'rnournrted'l por.

' and -g lugs near the top of said lower'section, a sleeve at the base of said upper section'having' longitudinal grooves therein as guideways for said lugs, a spring member positioned between the lower and upper sections of said shaft within said sleeve, spring-pressed pins, shoulders on said sleeve and pins supporting a pressure plate, an eccentric cam on said upper section, a xed outer cutter, an inner cutter reciprocally mounted therein having engagement with said cam and pins, and means for depressing said pressure plate to disengage said cam and pins, thereby permitting removal of said inner cutter.

` 4. The combination in a dry shaver of a motor casing, a rotatable shaft havingan upper and lower section, the upper section being slidablyl mounted upon the lower section and having a cam thereon adapted to engage and drive a cutter member, longitudinal lugs near the top of said lower section, a sleeve at the base of said upper section having longitudinal grooves therein as guideways for said lugs, a spring member positioned between the lower and upper sections of said shaft Within said sleeve, spring-pressed pins cooperating with said cutter, shoulders on said sleeve and pins, a trigger pivotally secured to the. casing, and means actuated by said trigger for slidably forcing the upper section down upon the lower section of the shaft to disengage said cutter from said cam and pins.

5. The combination in a dry shaver of a motor casing, a rotatable shaft having an upper and lower section, the upper section being slidably mounted upon the lower section, longitudinal lugs near the top of said lower section, a sleeve at the base of said upper section having longitudinal grooves therein as guideways for said lugs, spring-pressed pins, shoulders on said sleeve and pins, an eccentric cam on said upper section, a xed outer cutter, an inner cutter reciprocally mounted therein having engagement with said cam and pins, and resilient means for disengag ing said inner cutter.

6. .The combination in a dry shaver of a motor casing, -a rotatable shaft having an upper and lower section, the upper section being slidably mounted upon the lower section, longitudinal lugs near the top of said lower section, a sleeve at the base of said upper section having longitudinal grooves therein as guideways for said lugs, shoulders on said sleeve, a fixed outer cutter, an inner cutter reciprocally mounted therein, and resilient means for readily removing means for removing the inner cutter. A

8. A dry shaverof the type described including a motor casing, a member slidably mountedupon a rotatable shaft, a spring loosely held between cutter reciprocally mounted therein, 'and resilient said arm and rotatable shaft, spring-'pressed v plungers, an outer cutter,"an inner cuttery recipro cally mounted therein engaging said [arm and?. spring-pressed plungers. andmearis operable r the said arm and spring-pressed'plungers to engage them from the inner cutter. 'l l g. A dry shaver of the type describedfinclid a rotatable shaft, aspiring-'between :ii

tudinal grooves therein as guideways for said lugs, a xed outer cutter, an inner cutter recipro rotatable shaft, spring-pressed plungers, an outer cutter, an inner cutter reciprocally mounted therein and engaging said arm and springpressed plungers, and a pivotal lever operable on said arm and spring-pressed plungers to release them from engagement with said inner cutter While the outer cutter remains secured to the.

v motor casing.

mounted upon the lower section, longitudinal lugs near the top of said lower section, a sleeve at the base of said upper section having longically mounted therein, spring-pressed pins adapted to maintain said inner cutter in engagement with said outer cutter, an eccentric cam on said upper shaft section adapted to engage and drive said inner cutter, hshoulders on said sleeve and pins, a pressure plate carried on said shoulders, and a fork-shaped trigger adapted to depress said plate thereby permitting the removal of said inner cutter Without detaching said outer cutter.

I RUSSELL E. BENNER. 

